Tension feed roll jack



y 15, 1967 B. c. GRAY 3,319,933

TENSION FEED ROLL JACK Filed NOV. 23, 1965 INVENTOR 23- ll Bill a Gr A,5 y y 4 h. i. Q 0! u ATTORNEYS.

United States Patent 3,319,933 TENSION FEED ROLL JACK Billy C. Gray, 765De Baca Road, Las Cruces, N. Mex. 88001 Filed Nov. 23, 1965, Ser. No.510,152 3 Claims. (Cl. 254-101) This invention relates to a tension feedroll jack and more particularly to a jack which is especially designedto assist a repairman in removing the tension feed roll units of a cardpunch machine.

When removing and reinserting the tension feed roll unit of the cardfeeding mechanism in a card punch machine, it is necessary to remove thebolts holding the unit to a frame. This is done when there is a jammingof the cards or a repair is to be made to the system. 'Usually the rolltensionin-g unit elements are mounted on a bar which is bolted to theframe of the machine. This operation is difficult to accomplish with twohands, since each side of the bar must be unbolted and held at the sametime, also the bar must be held in alignment with bolt holes when thebar is remounted.

The aforesaid operation consumes approximately thirty minutes in a cardpunch machine of the IBM type.

The jack of the invention is especially designed to support the bareither when it is mounted or dismounted and reduces the operation fromapproximately thirty minutes to about five minutes and also preventsdamage to the feed roll unit that may result from accidental dropping ofthe unit or stripping of the bolt and hole threads due to misalignmentof the bar.

It is a primary object of this invention to provide a jack which isespecially designed to assist a repairman in mounting or dismounting atension feed roll unit of the card feed mechanism of a card punchmachine.

It is another object to provide a jack which is tiltable with respect toits foot.

A further object is to provide a jack having a load supporting framewhich may be elevated or lowered by tuming a nut integral with itselevation bolt.

A still further object is to provide a jack that is simple ofconstruction, easy to use and economical of manufacture.

These and other objects and advantages of the present invention will befully apparent from the following description when taken in connectionwith the annexed drawing, in which:

FIG. 1 is a schematic, fragmentary elevation of a card punch machine,partly broken away to expose a portion of the card feed mechanism andthe jack of the invention in position to support the tension feed rollunit;

FIG. 2 is a similar view of one end thereof;

FIG. 3 is a side elevation of the jack of the invention;

FIG. 4 is a sectional view taken along line 44 of FIG. 3; and,

FIG. 5 is a sectional view taken along line 55 of FIG. 4.

Referring in detail to the drawing, reference character 1 indicates,generally, a card punch machine.

As seen in FIGS. 1 and 2, card punch machine 1 is broken away to exposethe card feed mechanism, a portion of which is shown and is indicatedgenerally by 2 and includes an input hopper 3, an output hopper 4, upperfeed rollers 5 and lower feed rollers 6.

Rollers 5 and 6 feed cards 7 from input hopper 3 to output hopper 4.

Upper rollers 5 are journaled in side walls 8 and 9 while each lowerroller 6 is biased upwards by a spring biased member 10 mounted in a bar11 which is bolted to the side walls 8 and 9 by bolts 12.

3,319,933 Patented May 16, 1967 FIGS. 1 and 2 show only the card feedunits, all other mechanisms such as card punching mechanism is notillustrated for sake of clarity. The machine 1 forms no part of thisinvention and is illustrated and described only to shown the manner inwhich the jack of the invention is used.

The jack of the invention is indicated generally by 13 and in FIGS. 1and 2, is shown in place for use in supporting one of the feed roll bars11 when bolts 12 are removed.

Jack 13 is composed of a foot indicated generally by 14, an elevationbolt indicated generally by 15, and a frame, indicated generally by 16.

Foot 14 comprises an elongated block 17 which is provided withlongitudinally extending teeth 18 along its lower face.

Foot 14 is further bored centrally at its upper portion to form asemicircular pivot socket 19. A second clearance recess 20 having acurved roof is bored at its lower end and in the bottom portion. Socket19 and hole 20 are connected by an oblong slot 21 which flares outwardlytowards its lower end.

Elevation bolt 15 is machined from a single piece of stock and forms athreaded bolt portion 22, a hex nut portion 23 and a head 24 which isrounded at its lower end as at 25. Head 24 is bored longitudinally as at26 and again radially as at 27. Bore 27 is internally threaded.

Frame 16 comprises a substantially inverted, A-frame member 28 which hasa cut out portion 29 for a hand hold.

A-frame 28 is grooved at its upper end as at 30 and is further providedwith a threaded, longitudinal bore 31 and a counterbore 32.

Assembly of the jack is simple. threaded into threaded bore 31.

The rounded end 25 of head 24 is nested in semicircular socket 19 and abutton headed, smooth shank bolt 33 is inserted through oblong, flaredbore 21 and into bore 26 and a set screw 34 is threaded into threadedradial bore 27 and tightened against smooth bolt 33 (see FIG. 4).

The operation of jack 1 is seen in FIGS. 1 and 2. The jack 1 is placedunder bar 11 and the hex nut portion 23 is turned by a wrench (notshown) to elevate frame 28 until the lower end of bar 11 rests in groove30. Now the bolts 12 holding bar 11 to side walls 8 and 9 may be removedby lowering frame 28. The frame 28 being wider at its top will affordample support for the bar 11.

Upon installation of bar 11 and its tension roll unit, the bar 11 isplaced in the groove 11 and frame 28 is elevated until the bolt holes inside walls 8 and 9 and bar 11 (not shown) are aligned and bolts 12 arereinserted and the jack I removed.

Since the elevation bolt 15 is swivelled in socket 19, the jack 1 may beplaced in positions that may not be directly under bar 11. In this casethe frame 28 is tilted to accommodate the position, as shown in FIG. 1.

While only a preferred form of the invention has been shown anddescribed, other forms of the invention are contemplated and numerouschanges and modifications may be made therein without departing from thespirit of the invention as set forth in the appended claims.

What is claimed is:

1. A jack for use in the mounting and dismounting of a feed roll unit ina card punch machine comprising, a foot; an elevation bolt having athreaded portion at its upper end, a nut portion below said threadedportion and a head portion extending downwardly from said nut portion; aframe for supporting said feed roll unit threadably engaging saidelevation bolt; and means carried by said foot and said elevation boltfor swivel ably mounting said elevation bolt on said foot, said meansincluding a rounded end on said head, a smooth axial bore in said Boltportion 22 is head, a threaded bore in said head and disposed normal tosaid smooth bore, a semicircular socket located centrally in the upperportion of said foot, said socket receiving said rounded end of saidhead for swivelable movement therein, a clearance recess in the lowerportion of said foot, an outwardly and downwardly flaring slotconnecting said recess and said socket, a button headed, smooth shankbolt received in said axial bore and extending through said slot andinto said recess and a set screw threaded into said radial bore wherebysaid smooth bolt is held against axial movement and preventing removalfrom said axial bore.

2. A device as set forth in claim 1 wherein said foot comprises anelongated block having longitudinally extending teeth along its lowerend.

4 3. A device as set forth in claim 1 wherein said frame comprises aninverted, A-shaped member having a threaded, axial bore therethrough,there being a groove along its upper edge.

References Cited by the Examiner UNITED STATES PATENTS 270,394 1/1883Crecelius 254-401 842,641 1/1907 Fernau 254101 1,572,856 2/1926 Watsonet al 2541()1 2,181,163 11/1939 Akins 254-101 3,006,606 10/1961 P0111 et8.1. 254-101 OTHELL M. SIMPSON, Primary Examiner.

1. A JACK FOR USE IN THE MOUNTING AND DISMOUNTING OF A FEED ROLL UNIT INA CARD PUNCH MACHINE COMPRISING, A FOOT; AN ELEVATION BOLT HAVING ATHREADED PORTION AT ITS UPPER END, A NUT PORTION BELOW SAID THREADEDPORTION AND A HEAD PORTION EXTENDING DOWNWARDLY FROM SAID NUT PORTION; AFRAME FOR SUPPORTING SAID FEED ROLL UNIT THREADABLY ENGAGING SAIDELEVATION BOLT; AND MEANS CARRIED BY SAID FOOT AND SAID ELEVATION BOLTFOR SWIVELABLY MOUNTING SAID ELEVATION BOLT ON SAID FOOT, SAID MEANSINCLUDING A ROUNDED END ON SAID HEAD, A SMOOTH AXIAL BORE IN SAID HEAD,A THREADED BORE IN SAID AND DISPOSED NORMAL TO SAID SMOOTH BORE, ASEMICIRCULAR SOCKET LOCATED CENTRALLY IN THE UPPER PORTION OF SAID FOOT,SAID SOCKET RECEIVING SAID ROUNDED END OF SAID HEAD SWIVELABLE MOVEMENTTHEREIN, A CLEARANCE RECESS IN THE LOWER PORTION OF SAID FOOT, ANOUTWARDLY AND DOWNWARDLY FLARING SLOT CONNECTING SAID RECESS AND SAIDSOCKET, A BUTTON HEADED, SMOOTH SHANK BOLT RECEIVED IN SAID AXIAL BOREAND EXTENDING THROUGH SAID SLOT AND INTO SAID RECESS AND A SET SCREWTHREADED INTO SAID RADIAL BORE WHEREBY SAID SMOOTH BOLT IS HELD AGAINSTAXIAL MOVEMENT AND PREVENTING REMOVAL FROM SAID AXIAL BORE.